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How does locomotion take place in leech?
a. Leech can move both on land and water .
b. Leech locomotion consists of crawling and serpentine movements.
c. Swimming is another name for crawling movement .
d. Crawling movements are responsible for muscle contraction and relaxation. During moving on a substratum, the two suckers act as attachment sites .
f. Leeches are unable to swim quickly and perform undulating movements in the water .
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